向无源网络供电的双端柔性直流输电系统小信号稳定性分析  

Small Signal Stability Analysis of VSC-HVSC Applied to Passive Network

作　　者：杨洁[1] 刘开培[1] 王东旭[2] 秦亮[1] 

机构地区：[1]武汉大学电气工程学院,湖北省武汉市430072 [2]国网武汉供电公司,湖北省武汉市430013

出　　处：《中国电机工程学报》2015年第10期2400-2408,共9页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51207115)~~

摘　　要：小信号稳定性分析是柔性直流输电系统设计、工程建设及运行的前提,针对无源网络供电的双端柔性直流输电系统小信号稳定性展开研究。首先通过同步旋转坐标系的灵活选择与转换,推导系统各环节的线性化方程,建立不受交流系统短路容量限制的全局小信号模型,并通过电磁暂态仿真与小信号模型仿真对比,验证其正确性。基于该模型,采用模态分析法对系统稳定性进行分析,并提出灵敏度分析方法,用于识别系统不稳定性的症结。通过案例分析及仿真,证明该分析方法具备良好的准确性。Small signal stability analysis of VSC-HVSC applied to passive network, which is the prerequisite for design and construction, is discussed in this paper. By choosingd-q synchronous reference frame flexibly, the Linear equations of each part are modeled. And based on the state space method, the small signal model of whole system is established. Then the model was validated by comparing Electromagnetic transient simulation and the small-signal model simulation. Modal analysis is performed to identify the small signal stability of VSC-HVDC. And sensitivity analysis is used to find out the crux of instability. Finally, the case study and simulation show that the analytical method has good accuracy.

关 键 词：无源网络 柔性直流输电 小信号稳定性分析 同步旋转坐标系 灵敏度分析 

分 类 号：TM721[电气工程—电力系统及自动化]